661
FNCA52 TJSJ 121930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST THU MAR 12 2026
DISCUSSION
THE KBDI IN CABO ROJO SLIGHTLY DECREASED TO 660 COMPARED TO
YESTERDAY, BUT IT IS STILL ABOVE THE CRITICAL FIRE WEATHER
THRESHOLD. GUANICA IS IN 520 AND CAMP SANTIAGO 374. BEFORE NOON,
RH VALUES DECREASED TO LOW THE LOW 50S IN CABO ROJO AND EVEN
WINDS ARE LIGHTER, SOME PERIOD OF GUSTS UP TO 20 MPH WERE
REGISTERED. FOR THE REST OF THE AFTERNOON, RH VALUES SHOULD
INCREASE AS AFTERNOON CONVECTION IS EXPECTED ACROSS WESTERN PR,
KEEPING THE RISK LOW. AT THIS TIME AN RFD WILL NOT BE ISSUED, BUT
WE ENCOURAGE PARTNERS TO CONTINUE MONITORING CONDITIONS IN THE
COMING DAYS, PARTICULARLY ON SATURDAY AS A DRIER AIRMASS IS
EXPECTED TO ARRIVE.
PRZ014-130800-
SOUTHEAST COASTAL PLAINS-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 20 10 10
TEMP (24H TREND) 67 (-2) 86 (+1) 68 87
RH % (24H TREND) 93 (+3) 57 (-2) 88 47
WIND 20FT/EARLY(MPH) NE 10 E 14 E 13 E 18
WIND 20FT/LATE(MPH) NE 9 E 17 NE 11 E 19
MIXING HGT(FT-AGL/MSL) 5320 5710
TRANSPORT WND (MPH) E 13 E 17
VENT RATE (KT-FT) 58520 85650
DISPERSION 5 5
DSI 2 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-130800-
SOUTHERN HILLS-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 30 10 20
TEMP (24H TREND) 64 (-3) 82 (+2) 64 83
RH % (24H TREND) 97 (+6) 63 (-2) 97 56
WIND 20FT/EARLY(MPH) NE 9 E 11 NE 12 E 14
WIND 20FT/LATE(MPH) NE 8 E 12 NE 12 E 14
MIXING HGT(FT-AGL/MSL) 5800 6170
TRANSPORT WND (MPH) E 10 E 16
VENT RATE (KT-FT) 52200 86380
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-130800-
NORTH COASTAL PLAINS-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 30 50
TEMP (24H TREND) 67 (-2) 85 (0) 67 85
RH % (24H TREND) 99 (+3) 60 (-3) 98 58
WIND 20FT/EARLY(MPH) E 12 E 11 E 16 E 16
WIND 20FT/LATE(MPH) SE 12 E 17 E 14 E 19
MIXING HGT(FT-AGL/MSL) 4880 5430
TRANSPORT WND (MPH) E 14 E 20
VENT RATE (KT-FT) 58560 92310
DISPERSION 5 5
DSI 4 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-130800-
NORTHERN HILLS-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 40 10 50
TEMP (24H TREND) 64 (-2) 85 (+2) 65 84
RH % (24H TREND) 99 (+2) 60 (-2) 98 57
WIND 20FT/EARLY(MPH) E 11 E 10 E 13 E 14
WIND 20FT/LATE(MPH) SE 10 E 14 E 12 E 17
MIXING HGT(FT-AGL/MSL) 5540 5960
TRANSPORT WND (MPH) E 10 E 15
VENT RATE (KT-FT) 49860 77480
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-130800-
WEST COAST-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 70 20 50
TEMP (24H TREND) 65 (-2) 86 (0) 66 87
RH % (24H TREND) 97 (+4) 60 (-2) 97 55
WIND 20FT/EARLY(MPH) E 16 E 10 E 13 E 17
WIND 20FT/LATE(MPH) E 14 SE 11 E 18 E 14
MIXING HGT(FT-AGL/MSL) 5000 5640
TRANSPORT WND (MPH) E 5 E 13
VENT RATE (KT-FT) 20000 62040
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-130800-
EASTERN INTERIOR-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 30 40
TEMP (24H TREND) 65 (-3) 83 (+1) 65 83
RH % (24H TREND) 99 (+3) 63 (-2) 97 60
WIND 20FT/EARLY(MPH) E 10 E 11 E 12 E 14
WIND 20FT/LATE(MPH) E 10 E 11 E 12 E 13
MIXING HGT(FT-AGL/MSL) 5550 6200
TRANSPORT WND (MPH) E 13 E 16
VENT RATE (KT-FT) 61050 86800
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-130800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 60 50
TEMP (24H TREND) 63 (-3) 79 (+2) 64 79
RH % (24H TREND) 100 (+2) 67 (-1) 98 66
WIND 20FT/EARLY(MPH) E 8 E 10 E 10 E 13
WIND 20FT/LATE(MPH) E 6 E 10 E 10 E 12
MIXING HGT(FT-AGL/MSL) 4410 4960
TRANSPORT WND (MPH) E 14 E 18
VENT RATE (KT-FT) 52920 79360
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-130800-
CENTRAL MOUNTAIN RANGE-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE NONE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 0 60 0 50
TEMP (24H TREND) 61 (-3) 83 (+4) 62 83
RH % (24H TREND) 99 (+4) 61 (-3) 99 57
WIND 20FT/EARLY(MPH) E 11 E 6 E 11 E 11
WIND 20FT/LATE(MPH) E 10 E 9 E 12 E 11
MIXING HGT(FT-AGL/MSL) 6150 7160
TRANSPORT WND (MPH) E 7 E 10
VENT RATE (KT-FT) 36900 64440
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-130800-
CAYEY MOUNTAIN RANGE-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 40 30 40
TEMP (24H TREND) 64 (-2) 78 (0) 64 78
RH % (24H TREND) 100 (+2) 68 (-1) 99 65
WIND 20FT/EARLY(MPH) E 8 E 10 E 9 E 13
WIND 20FT/LATE(MPH) E 6 E 11 NE 9 E 13
MIXING HGT(FT-AGL/MSL) 5200 5600
TRANSPORT WND (MPH) E 14 E 18
VENT RATE (KT-FT) 62400 89600
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-130800-
VIEQUES-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 60 50
TEMP (24H TREND) 70 (-2) 85 (-1) 70 85
RH % (24H TREND) 92 (+5) 56 (+1) 88 57
WIND 20FT/EARLY(MPH) E 13 E 13 E 16 E 16
WIND 20FT/LATE(MPH) E 12 E 14 E 16 E 16
MIXING HGT(FT-AGL/MSL) 3510 3670
TRANSPORT WND (MPH) E 18 E 21
VENT RATE (KT-FT) 56160 66060
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-130800-
CULEBRA-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 60 50
TEMP (24H TREND) 71 (-2) 86 (0) 72 86
RH % (24H TREND) 90 (+4) 57 (-1) 88 57
WIND 20FT/EARLY(MPH) E 13 E 12 E 16 E 16
WIND 20FT/LATE(MPH) E 12 E 14 E 16 E 16
MIXING HGT(FT-AGL/MSL) 3430 3600
TRANSPORT WND (MPH) E 17 E 21
VENT RATE (KT-FT) 51450 64800
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-130800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 40 20 20
TEMP (24H TREND) 66 (-3) 87 (+1) 66 88
RH % (24H TREND) 92 (+6) 54 (-2) 94 46
WIND 20FT/EARLY(MPH) E 12 E 12 E 12 E 16
WIND 20FT/LATE(MPH) E 12 SE 16 E 14 E 21
MIXING HGT(FT-AGL/MSL) 5640 5840
TRANSPORT WND (MPH) E 8 E 16
VENT RATE (KT-FT) 39480 81760
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-130800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 50 30
TEMP (24H TREND) 71 (-3) 86 (+1) 72 86
RH % (24H TREND) 90 (+5) 55 (-3) 88 56
WIND 20FT/EARLY(MPH) E 13 E 13 E 16 E 17
WIND 20FT/LATE(MPH) E 13 E 13 E 16 E 14
MIXING HGT(FT-AGL/MSL) 3500 3600
TRANSPORT WND (MPH) E 17 E 22
VENT RATE (KT-FT) 52500 68400
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-130800-
ST CROIX-
330 PM AST THU MAR 12 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 60 30
TEMP (24H TREND) 70 (-3) 85 (0) 70 85
RH % (24H TREND) 94 (+9) 57 (-1) 89 56
WIND 20FT/EARLY(MPH) E 11 E 11 E 16 E 17
WIND 20FT/LATE(MPH) E 11 E 14 E 14 E 14
MIXING HGT(FT-AGL/MSL) 4210 4720
TRANSPORT WND (MPH) E 18 E 21
VENT RATE (KT-FT) 67360 84960
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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